ground shadows

[Jotaele]

My groud shadows, tree/building, are flickering like hell.It kills totally the overall aperance of the game.but i have seen videos from other users than doesnt have that effect.Im the only one with this problem?
Im having good FPS , and i have tryed all the settings, but those flickering are always there, is like the shadows are clipping with ground. I have same effect in the outside plane shadows, but less noticeable.
gtx 470, 19020 * 1200.I´m at work, i will try to post screenshots later.
Trying diferent settings in my grafics card setting, dosent help.